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The demonstration enumerates as a standard USB audio stereo headset with microphone. RAM audio buffer level is displayed in the buffer box (box empty= near underun, box full = near overrun). The frequency difference (in ppm) between the USB audio stream and the DAC (SSC/I2S or ABDAC) audio stream is displayed in the PPM box. Known issue: For the project AUDIO_EXAMPLE_ADAPTIF_SRC, the PPM box always display "0". CPU frequency (MHz) is displayed on the LCD in the CPU box. User control (play, pause, next, previous, volume up/down) is displayed in the HID box. The RAM status is also displayed on the LCD (data, bss, stack, total used heap, current used heap).
The application is based on three different tasks:
Architecture Overview
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